mythtv is setting the XV_HUE attribute to -1000 (which correspond to 0% in the Internal player) when setting the Hue to 50% in the Internal player, XV_HUE attribute is set back to 0 and colors are corrects.

A quick workaround for anyone else who has the problem is during playback hit the F key to cycle thru video controls until you get to HUE (it will be set to 0%, if you have the problem) then set it to 50%, with the arrow keys. When I did this the current OSD didn't indicate which setting I was adjusting I just kept hitting F until it showed one at 0%.

Both b2657a1a3f8a (via 0f8476995f ) and 0c00c0ac9 (via 2e7722d43 ) are in 0.25-fixes. Anyone who is seeing this issue should update to current 0.25-fixes, but may still need to fix old/broken values for the settings using the Playback Picture Controls UI (hit F during playback), as described.